# std::bitset<N>::operator&=,|=,^=,~

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< cpp‎ | utility‎ | bitset

bitset& operator&=( const bitset& other ); | (1) | (noexcept since C++11) (constexpr since C++23)
bitset& operator|=( const bitset& other ); | (2) | (noexcept since C++11) (constexpr since C++23)
bitset& operator^=( const bitset& other ); | (3) | (noexcept since C++11) (constexpr since C++23)
bitset operator~() const; | (4) | (noexcept since C++11) (constexpr since C++23)

Performs binary AND, OR, XOR and NOT.

1) Sets the bits to the result of binary AND on corresponding pairs of bits of *this and other.
2) Sets the bits to the result of binary OR on corresponding pairs of bits of *this and other.
3) Sets the bits to the result of binary XOR on corresponding pairs of bits of *this and other.
4) Returns a temporary copy of *this with all bits flipped (binary NOT).

Note that `&=`, `|=`, and `^=` are only defined for bitsets of the same size `N`.

### Parameters

other | - | another bitset

### Return value

1-3) *this
4) std::bitset<N>(*this).flip()

### Example

Run this code

    #include <bitset>
    #include <cstddef>
    #include <iostream>
    #include <string>

    int main()
    {
        const std::string pattern_str{"1001"};
        std::bitset<16> pattern{pattern_str}, dest;

        for (std::size_t i = dest.size() / pattern_str.size(); i != 0; --i)
        {
            dest <<= pattern_str.size();
            dest |= pattern;
            std::cout << dest << " (i = " << i << ")\n";
        }

        std::cout << ~dest << " (~dest)\n";
    }

Output:

    0000000000001001 (i = 4)
    0000000010011001 (i = 3)
    0000100110011001 (i = 2)
    1001100110011001 (i = 1)
    0110011001100110 (~dest)

### See also

operator<<=operator>>=operator<<operator>> | performs binary shift left and shift right (public member function)

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